Greek eco tanker owner and operator Top Ships has firmed up more employment for one of its product tankers and completed a refinancing package tied to four vessels, as the New York&ndash;listed owner continues to reshape its balance sheet.The company said it has agreed a three-year extension with Denmark’s Weco Tankers for the 50,000 dwt MR <em>Eco Marina Del Rey</em>. The new charter is fixed at $18,250 per day, adding an estimated $20m to Top Ships’ revenue backlog.The move comes as the fleet’s commercial coverage remains a priority for the Evangelos Pistiolis-led outfit, which has focused heavily on locking in term business for its eco tankers this year.Alongside the charter news, Top Ships confirmed it has closed the previously announced sale-and-leaseback financing with a major Chinese lender covering two VLCCs, one suezmax, and one MR tanker. Gross proceeds from the transaction, after repaying prior debt, amounted to about $27.2m. The company said the financing improves liquidity while maintaining operational control of the vessels.Top Ships currently controls a fleet of modern MR, suezmax and VLCC tonnage, all fitted with fuel-efficient technology and placed predominantly on medium to long-term charters.